package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dto.SetmealDto;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.mapper.SetmealMapper;
import com.itheima.reggie.service.SetmealDishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper,Setmeal> implements SetmealService {
    @Autowired
    private SetmealDishService setmealDishService;
    /**
     * 新增套餐，同时需要保存套餐和菜品的关联关系
     * @param setmealDto
     */
    @Override
    @Transactional
    public void saveWithDish(SetmealDto setmealDto) {
        //保存套餐的基本信息，操作setmeal，执行insert操作
        this.save(setmealDto);
        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes.stream().map((item)->{
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());
        //保存套餐和菜品的关联信息，操作setmeal_dish，执行insert操作
        setmealDishService.saveBatch(setmealDishes);
    }
    /**
     * 删除套餐，同时需要删除套餐和菜品的关联数据
     * @param ids
     */
    @Override
    @Transactional
    public void removeWithDish(List<Long> ids) {
        //查询套餐状态，确定是否可以删除
        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
        //传过来的所有id
        queryWrapper.in(Setmeal::getId,ids);
        queryWrapper.eq(Setmeal::getStatus,1);
        int count = this.count(queryWrapper);
        if (count>0){
            //如果不能删除，抛出一个业务异常
            throw new CustomException("套餐正在售卖中，不能删除");
        }
        //如果可以删除，先删除套餐表中的数据--setmeal
        this.removeByIds(ids);
        //删除关系表中的数据--setmeal_dish
        LambdaQueryWrapper<SetmealDish> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.in(SetmealDish::getSetmealId,ids);
        setmealDishService.remove(lambdaQueryWrapper);
    }
    //售卖,停,卖
    @Override
    public void selling(List<Long> ids) {
        Setmeal setMeal = new Setmeal();
        setMeal.setStatus(1);
        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
        LambdaQueryWrapper<Setmeal> in1 = queryWrapper.in(Setmeal::getId, ids);
        this.update(setMeal,in1);

    }

    @Override
    public void stopSelling(List<Long> ids) {
        Setmeal setMeal = new Setmeal();
        setMeal.setStatus(0);
        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
        LambdaQueryWrapper<Setmeal> in1 = queryWrapper.in(Setmeal::getId, ids);
        this.update(setMeal, in1);
    }
    //根据id查询套餐信息
    @Override
    public SetmealDto getByIdDto(Long id) {
        Setmeal setmeal = this.getById(id);
        SetmealDto setmealDto = new SetmealDto();
        BeanUtils.copyProperties(setmeal,setmealDto);
        //查询当前套餐对应的菜品信息，从Setmeal_Dish表查询
        LambdaQueryWrapper<SetmealDish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SetmealDish::getSetmealId,id);
        //将查询得到的菜品数据赋给SetmealDto
        List<SetmealDish> list = setmealDishService.list(queryWrapper);
        setmealDto.setSetmealDishes(list);
        return setmealDto;
    }
    //修改套餐
    @Override
    public void updateWithFlavor(SetmealDto setmealDto) {
        //更新dish表基本信息
        this.updateById(setmealDto);
        //清理当前菜品对应口味数据--setmeal_dish表的Delete操作
        LambdaQueryWrapper<SetmealDish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SetmealDish::getSetmealId,setmealDto.getId());
        setmealDishService.remove(queryWrapper);
        //添加当前提交过来的口味数据---setmeal_dish表的insert操作
        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes =setmealDishes.stream().map((item)->{
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());
        setmealDishService.saveBatch(setmealDishes);
    }
}
